Systems and methods for Physical Control Verification and Authentication Event Scan Logging

Abstract

Systems and methods to perform verification of physical control of a security device by a user are disclosed. In one aspect, embodiments of the present disclosure include a method for identifying a symbol in a first image frame of a microlens array of the security device and/or determining a position of the symbol relative to a predetermined point on a 2D plane of the security device. In a further embodiment, a rate of change of the position of the symbol between a second image and the first image frame of the microlens array can be determined. The physical control of the security device by the user is, for example, ascertained if the user is in close proximity to the security device of if the security device is within a line of sight of the user.

What is claimed is: 
     
         1 . A method to perform verification of physical control of a security device by a user, the method, comprising:
 identifying a symbol in a first image frame of a microlens array of the security device;   determining a position of the symbol relative to a predetermined point on a 2D plane of the security device;   determining a rate of change of the position of the symbol between a second image and the first image frame of the microlens array.   
     
     
         2 . The method of  claim 1 , comprising:
 capturing, by a sensor device, the first image frame and the second image frame of the security device depicting the symbol of the microlens array.   
     
     
         3 . The method of  claim 2 , wherein:
 the position of the symbol relative to the predetermined point on the 2D plane of the security device is determined as a function of a rotational position of the sensor device of a translational position of the sensor device, relative to the security device.   
     
     
         4 . The method of  claim 2 , wherein:
 the rate of change of the of the position of the symbol is determined as a function of change in a position between the sensor device and the security device.   
     
     
         5 . The method of  claim 2 , further comprising:
 deploying a challenge-response protocol to instruct the user to orient the sensor device relative to the security device to determine the physical control of the security device by the user;   wherein, the challenge-response protocol is depicted in an augmented reality environment via the sensor device to facilitate participation the challenge-response protocol by the user.   
     
     
         6 . The method of  claim 1 , wherein:
 the physical control of the security device by the user is ascertained if the user is in close proximity to the security device of if the security device is within a line of sight of the user.   
     
     
         7 . The method of  claim 1 , further comprising:
 performing the verification of the physical control of the security device by the user in response to a request from a requesting user;   transmitting, to the requesting user, a result of the verification of whether the security device is in the physical control of the user.   
     
     
         8 . A method to authenticate a security device, the method, comprising:
 capturing, by an optical sensor, multiple frames of images of the security device;   wherein, the security device includes a diffractive surface;   measuring, from the multiple frames of images, changes to an optical property of the diffractive surface of the security device;   determining whether the changes in the optical property matches or fails to match a valid change, the valid change being predetermined for the optical property.   
     
     
         9 . The method of  claim 8 , wherein:
 the valid change in the optical property is determined from a change in color or spectral properties of the diffractive surface.   
     
     
         10 . The method of  claim 8 , wherein:
 the valid change in the optical property is determined from a change in spatial frequency of a periodic pattern caused by reflective diffraction of a point light source of the optical sensor by the diffractive surface of the security device.   
     
     
         11 . The method of  claim 8 , wherein:
 the valid change in the optical property is determined from a change in spatial frequency of an emergent periodic pattern resulting from superposition of two or more periodic patterns on the diffractive surface of the security device.   
     
     
         12 . The method of  claim 8 , further comprising:
 altering optical stimulus properties of the optical sensor to cause the changes in the optical property of the diffractive surface of the security device.   
     
     
         13 . The method of  claim 12 , wherein:
 wherein, the optical stimulus properties of the optical sensor is controlled by illumination by different types of light, or with or without flash on during illumination.   
     
     
         14 . The method of  claim 12 ,
 wherein, the optical stimulus properties of the optical sensor is controlled by illumination by a first type of light and a second type of light;   wherein, the first type of light causes a first image of the multiple frames of images to be captured;   wherein, the second type of light causes a second image of the multiple frames of images to be capture;   
     
     
         15 . The method of  claim 8 , wherein:
 wherein, the optical stimulus properties of the optical sensor is controlled by illumination of specific wavelengths of light or filtering out specific wavelengths of light.   
     
     
         16 . A system to perform a scan event to authenticate a security device, the system, comprising:
 an optical sensor;   wherein, in operation, the optical sensor, captures image frames of the security device;   a processing unit coupled to the optical sensor;   memory having stored there on instructions, which when executed by the processor, cause the system to:   measure, from the sequential image frames of the security device, changes to an optical property of the security device;   determine whether the changes in the optical property matches or fails to match a valid change, the valid change being predetermined for the optical property;   aggregate scan event data from the scan event and log the scan event data.   
     
     
         17 . The system of  claim 16 , wherein:
 the optical sensor is comprised in a mobile device;   further wherein, the scan event data includes data relating to, one or more of, the mobile device, applications on the mobile device or a user of the mobile device.   
     
     
         18 . The system of  claim 16 , wherein:
 the scan event data is stored in a distributed ledger including a blockchain   
     
     
         19 . The system of  claim 16 , wherein:
 the security device includes a microlens array.   
     
     
         20 . The system of  claim 16 , wherein:
 the security device includes a diffractive surface.